小麦抗源兴资9104抗条锈性遗传研究初报

采用常规杂交和基因推导法相结合，在苗期和成株期对小麦优良抗病种质兴资9104进行抗条锈性遗传研究。结果表明，兴资9104至少含有1对显性全生育期抗条锈病基因和1对成株抗条锈病基因，分别控制对条锈菌生理小种条中17号的全生育期抗性和对条中32号的成株期抗性。兴资9104可能携带有YrSK基因。建议在小麦抗病育种中

Inheritance of Yellow Rust Resistance in an Elite Wheat Germplasm Xingzi 9104

Yellow rust of wheat caused by Puccinia striiformis West.is economically important in most wheat growing areas in China.Epidemics of wheat yellow rust have occurred annually since 1950,all over the country or in some areas.Breeding and using of wheat resistance cultivars are the cheapest,most reliable and environmentally safest way to control the disease.A great deal of effort has been spent on enhancing the genetic diversity by seeking resistance genes from wheat genetic materials and subsequently transferring them into cultivated wheat.Inheritance of resistance of Xingzi 9104,an elite wheat germplasm,against wheat yellow rust(Puccinia striiformis West.) was analyzed by combining the hybridization with postulation of genes for yellow rust resistance of wheat.The results indicated that there were at least one pair of dominant independent genes to Puccinia striiformis at the seedling stage of Xingzi 9104 which control the resistance to CY17 of P.striiformis,one pair of dominant genes to Puccinia striiformis at the adult plant stage which control the resistance to CY32 of P.striiformis.The gene YrSk for yellow rust resistance at the seedling stage was also postulated in Xingzi 9104.The wheat line can be used in wheat improvement program for controlling wheat yellow rust effectively in China.